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Flashlight Activated Burglar Alarm Circuit

Last Updated on January 31, 2024 by Swagatam 3 Comments

flashlight activated burglar alarm circuit

This flashlight triggered burglar alarm circuit will instantly switch ON an alarm as soon as it detects light from the burglar’s torch or flashlight. Burglars and thieves normally set out to steal or rob during nights, when it is completely dark, and depend on a flashlight to investigate the area. Our circuit is setup and […]

Filed Under: Security and Alarm Tagged With: Activated, Alarm, Burglar, Flashlight

Automatic Night Activated Wireless Light Circuit for Paintings

Last Updated on January 10, 2024 by Swagatam 12 Comments

single relay 433 MHz remote control switch

In this article I have explained a basic wireless LED light circuit that may be used to autonomously turn on LED lights to illuminate artworks at nighttime.

Filed Under: Automation Projects, Lamps and Lights Tagged With: Activated, Automatic, Light, Night, Paintings, Wireless

Sound Activated LED Lamp Circuit

Last Updated on December 3, 2023 by Swagatam Leave a Comment

A highly sensitive sound activated LED lamp circuit can be built using just a few transistors and resistors. The circuit is actually a high gain MIC amplifier circuit which amplifies the external sound hitting the MIC. The amplified signal is then used to momentarily illuminate a bunch of LEDs. What does the Circuit do? Basically, […]

Filed Under: Lamps and Lights Tagged With: Activated, Lamp, LED, Sound

Darkness Activated PIR Lamp Circuit

Last Updated on January 10, 2024 by Swagatam 8 Comments

Darkness or night time activated PIR lamp circuit

A very simple darkness activated or night activated PIR lamp circuit project has been explained in the following article. Further in the article we also learn how to upgrade this circuit with an additional emergency lamp facility. This darkness activated PIR lamp will work as I have explained below: It will remain deactivated or disabled […]

Filed Under: Lamps and Lights Tagged With: Activated, Darkness, Lamp, PIR

Sound Activated Remote Control Circuit

Last Updated on June 8, 2023 by Swagatam Leave a Comment

double sound operated ON OFF remote switch

This sound activated remote control circuit can be used to operate any electrical load ON/OFF, through a double sound command. Thus, the circuit ensures that the load cannot be operated through any random single sound triggers, which makes the circuit very fool proof. Our device will require two shifted sound commands. However, the second sound […]

Filed Under: Remote Control Circuits Tagged With: Activated, Control, Remote, Sound

Whistle Activated Switch Circuit

Last Updated on January 2, 2024 by Swagatam Leave a Comment

whistle activated switch circuit diagram

In this post I have explained how to build a simple whistle sound operated relay circuit, which can be used for switching ON/OFF a 220 V load through whistle sounds. You can consider this circuit to be a whistle operated remote control circuit which will operate a connected load remotely through the sound of whistling. […]

Filed Under: Remote Control Circuits Tagged With: Activated, Switch, Whistle

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